How can dynamic SQL queries be generated in PHP to search across multiple tables with variable names?

When generating dynamic SQL queries in PHP to search across multiple tables with variable names, you can use PHP variables to store the table names and dynamically construct the query based on user input. By using concatenation or interpolation, you can build the SQL query string with the appropriate table names and conditions. 

// Example of generating dynamic SQL query to search across multiple tables with variable names

// Define the table names based on user input or logic
$table1 = "users";
$table2 = "products";

// Define the search term provided by the user
$searchTerm = $_GET['search'];

// Construct the SQL query dynamically
$query = "SELECT * FROM $table1 WHERE column_name LIKE '%$searchTerm%'
          UNION
          SELECT * FROM $table2 WHERE column_name LIKE '%$searchTerm%'";

// Execute the query using your database connection
$result = mysqli_query($connection, $query);

// Process the results as needed
while ($row = mysqli_fetch_assoc($result)) {
    // Do something with the retrieved data
}

Keywords

PHP dynamic SQL queries multiple tables variable names search

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